/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.util;



import com.bff.gaia.unified.vendor.guava.com.google.common.base.MoreObjects;



import java.io.FilterInputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;



/**

 * A {@link OutputStream} wrapper which protects against the user attempting to modify the

 * underlying stream by closing it or using mark.

 */

public class UnownedInputStream extends FilterInputStream {

  public UnownedInputStream(InputStream delegate) {

    super(delegate);

  }



  @Override

  public void close() throws IOException {

    throw new UnsupportedOperationException(

        "Caller does not own the underlying input stream " + " and should not call close().");

  }



  @Override

  public boolean equals(Object obj) {

    return obj instanceof UnownedInputStream && ((UnownedInputStream) obj).in.equals(in);

  }



  @Override

  public int hashCode() {

    return in.hashCode();

  }



  @SuppressWarnings("UnsynchronizedOverridesSynchronized")

  @Override

  public void mark(int readlimit) {

    throw new UnsupportedOperationException(

        "Caller does not own the underlying input stream " + " and should not call mark().");

  }



  @Override

  public boolean markSupported() {

    return false;

  }



  @SuppressWarnings("UnsynchronizedOverridesSynchronized")

  @Override

  public void reset() throws IOException {

    throw new UnsupportedOperationException(

        "Caller does not own the underlying input stream " + " and should not call reset().");

  }



  @Override

  public String toString() {

    return MoreObjects.toStringHelper(UnownedInputStream.class).add("in", in).toString();

  }

}